I'd like to remind everyone that I've been warning the Linux world about the precarious, uncertain future of Firefox for years now. The single most important desktop Linux application is in a death spiral and entirely dependent on free Google money. Not a good base to work from.
With today's news, I only feel strengthened in my conviction that the major desktop projects in the Linux world need to come together in a serious manner to discuss the establishment of a browser project optimised for Linux. Pick an engine, let the GNOME and KDE developers build a native UI on top, and take matters into your own hands. If you can build the two best desktop environments in desktop computing today, you can build a first-class browser together.
This is existential.